Donald, son of Mortogh O'Brien, and king of the Danes of Dublin, defeats the Irish of Leinster with great slaughter.

1123

Turlogh O'Connor, king of Ireland, gives the sovereignty of Dublin to the king of Leinster.

1142

The Danes of Dublin invade North Wales, but are repelled with loss.

1146

The nunnery of St. Mary de Hogges built outside the eastern gate of the city, afterwards called Dame's Gate, by Dermot McMurrogh, king of Leinster

1152

Dublin erected into an archbishoprick by a Bull of Eugenius IV., which was published at the synod of Kells by Cardinal Paparo, the pope's legate.

1162

Lawrence O'Toole made archbishop of Dublin. The Danes of Dublin defeated and McMurrogh, king of Leinster spoiled by Dermot

1165

The Danes of Dublin send forces to assist Henry II against David Ap Owen, prince of North Wales, but the expedition failed through want of provisions

1166

The monastery of All Hallows, or All Saints, built by Dermot, king of Leinster, on the ground on which Trinity College now stands. Roderic O'Connor, King of Ireland, honourably received and entertained by the people of Dublin, who do him homage, and receive from him a present of 4,000 oxen.

1167

Dermot McMurrogh expelled by Roderic, who receives hostages from the Danes of Dublin,

1169

The Danes of Dublin sue for peace, and give hostages to Dermot and Fitzstephen, the commanders of the English, who landed this year at Bannow, in the county of Wexford,